Volume Bragg gratings (VBGs) in photothermorefractive (PTR) glass are widely used for laser beam control including high-power laser systems. Among them, spectral beam combining based on VBGs is one of the most promising. Achieving 100+ kW of combined laser beams requires the development of PTR glass and VBGs with an extremely low absorption coefficient and therefore methods of its measurement. ...

Section 20.6.6.2 [util.smartptr.shared], paragraph 1, talks about the class template shared_ptr storing a pointer, but does not introduce explicit the pointer owned by the shared pointer (with the corresponding object of some type Y that is being owned). This makes it hard for the reader to realize that this is different from the pointer stored by this same shared pointer (the address of the ob...

Calcifying epitheliomas are uncommon tumors involving the hair matrix. Calcification is seen in most of these tumors} More than 75% of cases occur in the head and neck region during the first two decades oflife. Treatment of choice is surgical excision. Calcifying epitheliomas can be multiple and rarely manifest atypical changes or malignant behavior.4 I describe three cases of calcifying epith...